OPTIMIZATION OF 2-STAGE TURBOCHARGED GAS SI ENGINE UNDER STEADY STATE OPERATION

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00321433" target="_blank" >RIV/68407700:21220/17:00321433 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

OPTIMIZATION OF 2-STAGE TURBOCHARGED GAS SI ENGINE UNDER STEADY STATE OPERATION

Popis výsledku v původním jazyce

The proposed paper deals with an optimization of a highly-turbocharged large-bore gas SI engine. Only steady state operation (constant engine speed and load) is considered. The paper is mainly focused on heoretical potential of 2-stage turbocharging concept in terms of performance and limitation. The results are obtained by means of simulation using complex 0-D/1-D engine model including the control algorithm. Different mixture composition concepts are considered to satisfy different levels of NOx limit – fresh air mixed with external cooled EGR is supposed to be the right approach while optimal EGR level is to be found. Considering EGR circuit, 5 different layouts are tested to select the best design. As the engine control is relatively complex (2-sage turbocharger group, external EGR, compressor blow-by, controlled air excess), 5 different control means of boost pressure were considered. Each variant based on above mentioned options is optimized in terms of compressor/turbine size (swallowing capacity) to obtain the best possible BSFC. The optimal variants are compared and general conclusions are drawn.

Název v anglickém jazyce

OPTIMIZATION OF 2-STAGE TURBOCHARGED GAS SI ENGINE UNDER STEADY STATE OPERATION

Popis výsledku anglicky

The proposed paper deals with an optimization of a highly-turbocharged large-bore gas SI engine. Only steady state operation (constant engine speed and load) is considered. The paper is mainly focused on heoretical potential of 2-stage turbocharging concept in terms of performance and limitation. The results are obtained by means of simulation using complex 0-D/1-D engine model including the control algorithm. Different mixture composition concepts are considered to satisfy different levels of NOx limit – fresh air mixed with external cooled EGR is supposed to be the right approach while optimal EGR level is to be found. Considering EGR circuit, 5 different layouts are tested to select the best design. As the engine control is relatively complex (2-sage turbocharger group, external EGR, compressor blow-by, controlled air excess), 5 different control means of boost pressure were considered. Each variant based on above mentioned options is optimized in terms of compressor/turbine size (swallowing capacity) to obtain the best possible BSFC. The optimal variants are compared and general conclusions are drawn.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

MECCA Journal of Middle European Construction and Design of Cars

ISSN

1214-0821

e-ISSN

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Svazek periodika

XV

Číslo periodika v rámci svazku

02

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

28

Strana od-do

9-36

Kód UT WoS článku

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EID výsledku v databázi Scopus

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